    div {
        width: 800px;
        height: 400px;
        background-color: #fbe9cd;
    }
    
    .big {
        background-color: rgb(0, 0, 0);
        width: 120px;
        height: 30px;
        font: 20px "微软雅黑";
        color: rgb(255, 255, 255);
        margin: 50px 340px 100px;
        border-radius: 10px;
    }
    
    h1,
    p {
        text-align: center;
    }
    
    h1 {
        padding: 100px 100px 30px;
    }